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Colour

#131D5B

  • #131D5B
  • Blue
  • Dark
  • Nearest: Midnight blue

#131D5B is a blue with RGB values 19, 29, 91 and HSL 232°, 65%, 22%. It is a dark colour, so white text on it reaches 15.5:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#131D5B#131D5B
HEX#131D5B
RGBrgb(19, 29, 91)
RGB (0–1)0.0745, 0.1137, 0.3569
RGB percentages7.5%, 11.4%, 35.7%
HSLhsl(231.7, 65.5%, 21.6%)
HSV / HSBhsv(231.7, 79.1%, 35.7%)
CMYK79.1%, 68.1%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,252,699
CSS custom property--colour: #131D5B;

Brightness & contrast

Relative luminance0.01773WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.5:1
Contrast with white15.5:1WCAG normal text: AAA
Contrast with black1.35:1WCAG normal text: Fail
Greyscale equivalent#1F1F1F
Inverted#ECE2A4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00285Dno red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#00215Ano green cones; the most common form, about 1% of men; ΔE 5.5 from the original
Tritanopia#002D39no blue cones; rare, and affects men and women equally; ΔE 39.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.5:1WCAG large text: AAA
Contrast with black, large text1.35:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 16.1Dark slateblue · ΔE 18Rebecca purple · ΔE 30.6Indigo · ΔE 35.4Navy · ΔE 37.9Slate blue · ΔE 39.9
Nearest named CSS colourMidnight blue (#191970)ΔE 16.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B5113
Analogous#13415B, #2D135B
Triadic#5B131D, #1D5B13
Split complementary#5B2D13, #415B13
Tetradic#5B1341, #5B5113, #135B2D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5D6FDD
Lighter +30%#3349D4
Lighter +20%#2538AF
Lighter +10%#1C2A85
Darker −10%#0A1031
Darker −20%#010207
Darker −30%#000000
Darker −40%#000000
More saturated +25%#051369
Less saturated −25%#21274D

Channel breakdown

R19
G29
B91
Red19 (7.5%)
Green29 (11.4%)
Blue91 (35.7%)
Hue231.67°
Saturation (HSL)65.45%
Lightness21.57%
Dominant channelBlue
Hex per channelR 13 · G 1D · B 5B

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Every value on this page was computed from “131d5b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.